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The Fundamental Unit of Life Test - 30

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The Fundamental Unit of Life Test - 30
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following is a common feature of mitochondria and chloroplasts?
    Solution
    Both mitochondria and chloroplast possess their own genetic material, which resembles prokaryotic DNA. These also contain ribosomes. they are thus self-replicating bodies that undergo binary fission and can produce their copies. 
    So, the correct answer is option A.
  • Question 2
    1 / -0
    Tissue is formed by the combination of
    Solution
    Tissues form by the combination of cells. Organs form by the combination of tissues and organ systems form by the combination of different organs. All the organ systems combine and forms an organism.
    So, the correct answer is (C).
  • Question 3
    1 / -0
    Select the most appropriate option.

    Eukaryotic cells have a dense double membrane-bound structure inside, called:
    Solution
    A eukaryotic cell has a nucleus bounded by a double-walled membrane structure known as a nuclear membrane. The nucleus contains the chromatin threads and the nucleolus. The gel-like texture of the nucleoplasm embedded with chromatin threads gives it a dense appearance.
    Hence the correct option is A.
  • Question 4
    1 / -0
    The fine network of membrane-bound tubes, distributed throughout the cytoplasm in a cell is:
    Solution
    The endoplasmic reticulum (ER) is a system of the membrane-bound network that runs through the cytoplasm. ER remains continuous with the plasma membrane, nuclear envelope, and Golgi complex. ER manufactures proteins and lipids that are involved in membrane biogenesis (building the cell membrane). 
    Therefore, the correct answer is option C.
  • Question 5
    1 / -0
    "Division of labour" in multicellular animals means:
    Solution
    • In a unicellular organism, a single cell has to perform all the functions necessary for its survival. 
    • Multicellular organisms are made up of many cells. They show division of labor in which different cells are specialized to perform different functions.
    • For example: Red blood cells carry oxygen to different organs, nerve cells carry information from different parts of the body to brain and vice versa.

    Thus, the correct answer is option C.
  • Question 6
    1 / -0
    ______ is found in eukaryotic cells but not in prokaryotic cells.
    Solution
    Eukaryotic cells differ from prokaryotic cells in having a well-defined nucleus with a nuclear membrane. The prokaryotic cells have a primitive nucleus without a nuclear membrane, where the nuclear material lies freely in the cytoplasm.
    The cell wall is present in a prokaryotic cell and in some of the eukaryotic cells. Ribosome and plasma membrane are present in both eukaryotic and prokaryotic cells.
    Thus, the correct answer is option C.
  • Question 7
    1 / -0
    Passive movement of a substance from a region of its high concentration to a region of its low concentration is:
    Solution
    Diffusion is a passive movement of substances from the region of high concentration to the region of low concentration. Diffusion finally stops when the concentration of particles of two regions becomes the same. Diffusion occurs in both liquids and gases and can take place over long distances. 
    So, the correct answer is B.
  • Question 8
    1 / -0
    The nucleus is separated from cytoplasm by
    Solution
    In the eukaryotic cell, the nucleus is separated from the cytoplasm by a double lipid bilayer membrane known as a nuclear membrane. It encloses the genetic material of a cell. It is also known as karyotheca.
    Hence the correct option is D.
  • Question 9
    1 / -0
    Diffusion finally stops when
    Solution
    Diffusion finally stops when the concentration of particles of two regions becomes the same diffusion occurs in both liquids and gases and can take place over long distances diffusion in gases are much faster than in liquids the diffusion rate of oxygen in air is $$1,00,000$$ times more than diffusion rate of oxygen in water.
  • Question 10
    1 / -0
    While doing onion peeling experiment, what is the most common problem faced in it?
    Solution
    While doing the onion peeling experiment, the major problem that everyone faced is to handle the onion epidermis as it is very thin and it folds in itself. The use of needles can be ineffective, or cause a disaster in the thin membrane. Thus, the thin epidermis is the most common problem that could be faced in the onion peeling experiment. Therefore, the correct answer is option A.
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